Results 21 to 30 of about 610,695 (319)
Using spin bias to manipulate and measure quantum spin in quantum dots [PDF]
PHYSICAL REVIEW B 77, 235309 (2008), 2008 A double-quantum-dot coupled to electrodes with spin-dependent splitting of chemical potentials (spin bias) is investigated theoretically by means of the Green's functions formalism. By applying a large spin bias, the quantum spin in a quantum dot (the dot 1) can be manipulated in a fully electrical manner.
arxiv +1 more source
Co-tunneling spin blockade observed in a three-terminal triple quantum dot [PDF]
Phys. Rev. B 96, 155414 (2017), 2017 We prepare a triple quantum dot with a separate contact lead to each dot to study Pauli spin blockade in the tunnel-coupled three dots in a row. We measure the tunneling current flowing between the center dot and either the left or right dot with the left and right leads as a common source and the center lead as a drain. In the biased stability diagram,
arxiv +1 more source
Proceedings of the National Academy of Sciences, 2016 The purpose of this communication is to make a bibliographic review of Quantum Dots methods and their applications in the field of Biotechnology. Quantum dots (QDs) are a novel class of inorganic fluorophores, which are gaining widespread recognition as a result of their exceptional photophysical properties.
Pimentel Naranjo, Víctor +1 more
openaire +5 more sources
A two-dimensional array of single-hole quantum dots [PDF]
, 2020 Quantum dots fabricated using techniques and materials that are compatible with semiconductor manufacturing are promising for quantum information processing. While great progress has been made toward high-fidelity control of quantum dots positioned in a linear arrangement, scalability along two dimensions is a key step toward practical quantum ...
arxiv +1 more source
Excitonic properties of strained wurtzite and zinc-blende GaN/Al(x)Ga(1-x)N quantum dots [PDF]
J. Appl. Phys. 94, 7178 (2003), 2003 We investigate exciton states theoretically in strained GaN/AlN quantum dots with wurtzite (WZ) and zinc-blende (ZB) crystal structures, as well as strained WZ GaN/AlGaN quantum dots. We show that the strain field significantly modifies the conduction and valence band edges of GaN quantum dots.
arxiv +1 more source
Efficient Quantum Dot−Quantum Dot and Quantum Dot−Dye Energy Transfer in Biotemplated Assemblies [PDF]
ACS Nano, 2011 CdSe semiconductor nanocrystal quantum dots are assembled into nanowire-like arrays employing microtubule fibers as nanoscale molecular "scaffolds." Spectrally and time-resolved energy-transfer analysis is used to assess the assembly of the nanoparticles into the hybrid inorganic biomolecular structure. Specifically, we demonstrate that a comprehensive
Marc Achermann +4 more
openaire +3 more sources
Solution of the Schrödinger Equation for Quantum Dot Lattices with Coulomb Interaction between the Dots [PDF]
Phys. Rev. B 62, 8126 (2000), 2000 The Schr\"odinger equation for quantum dot lattices with non-cubic, non-Bravais lattices built up from elliptical dots is investigated. The Coulomb interaction between the dots is considered in dipole approximation. Then only the center of mass (c.m.) coordinates of different dots couple with each other. This c.m.
arxiv +1 more source
Photovoltaic Performance of a Nanowire/Quantum Dot Hybrid Nanostructure Array Solar Cell
Nanoscale Research Letters, 2018 An innovative solar cell based on a nanowire/quantum dot hybrid nanostructure array is designed and analyzed. By growing multilayer InAs quantum dots on the sidewalls of GaAs nanowires, not only the absorption spectrum of GaAs nanowires is extended by ...
Yao Wu, Xin Yan, Xia Zhang, Xiaomin Ren
doaj +1 more source
Polar optical phonons in wurtzite spheroidal quantum dots: Theory and application to ZnO and ZnO/MgZnO nanostructures [PDF]
J. Phys.: Condens. Matter 17, 1085 (2005), 2004 Polar optical-phonon modes are derived analytically for spheroidal quantum dots with wurtzite crystal structure. The developed theory is applied to a freestanding spheroidal ZnO quantum dot and to a spheroidal ZnO quantum dot embedded into a MgZnO crystal. The wurtzite (anisotropic) quantum dots are shown to have strongly different polar optical-phonon
arxiv +1 more source
Nonlinear Optical Properties of CdSe and CdTe Core-Shell Quantum Dots and Their Applications
Frontiers in Physics, 2021 The strong nonlinear optical behavior of low-dimensional materials, such as quantum dots and core-shell quantum dots, has been a topic of intense research in recent years.
Um e Kalsoom +3 more
doaj +1 more source